Hi CPU usage of dovecot/anvil

Daniel Santos

• March 21, 2026 16:41

Hi, 
I've been seeing a very high cpu usage from dovecot/anvil

If I restart dovecot, it normalizes but I need to debug this to check the reason.

How can I debug dovecot/anvil ?

• 

  cPRex Jurassic Moderator

  • July 15, 2026 14:04

  Rogerio Vitiello - are you able to create a ticket?

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  ddrhost

  • July 20, 2026 15:28

  Same problem. Even with servers running fresh installations and just two clients.

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  ddrhost

  • July 20, 2026 19:45

  It appears to be related to the cpanel-dovecot version 2.4.4. There is also a loop in epoll_wait().

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  murmaider

  • July 21, 2026 05:25

  For people who come across this post - https://support.cpanel.net/hc/en-us/articles/37837983398039-Dovecot-Anvil-permanent-highload-due-spin-loop 

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